Reversible turbine.



No. 876,218. PATBNTED JANyv, 1908.

' H. M. MURPHY.

REVERSIBLE TURBINE. ApPLIoATIoN FILED JAN. 1s, 1907.-

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`shank of a fixed steam box 7.

PATENT OFFICE.

HALLET MORTON MURPHY, OF CHICAGO, ILLINOIS.

RE VERSIB LE TURB INE Speccation of Letters Patent.

Patelnted Jan. '7, 1908.

Appiiaaon med January is. 1907. serai No. 352.575.

.To all whom t may concern:

Be it known that I, HALLET M. MURPHY, a citizen of the United States, residing at Chicago, in the State of Illinois, have invented certain new and useful Improvements in Reversible Turbines, of which the followingI is a specification.

My invention relates to turbines especially adapted to use elastic iiuids, such as steam, and particularly means for readily reversing` the turbine and controlling it. The principal objects of the invention are, to provide a turbine with a revolving driving member which may be readily reversed in direction of movement by valves; to provide a convenient fixed escape port for the steam, and convenient slide valves for controlling said ports; to provide an improved form of driving vanes for the turbine, and to improve the design of the driving and escape ports. These objects and other advantages which will hereinafter appear I attain by means of the construction illustrated in a simple preferred form in the accompanying drawing, wherein- Figure 1 is a partial side elevation and partial central longitudinal section through the turbine and the casing therefor;

Figure 2 is a partial elevation of the controlling valve, and a section taken along the line (2) in Figure 1 through the casing and the driving member 5 Figure 3 is a longitudinal central section through the fixed escape port box for the steam, showing the form of the escape ports.

In the form shown in the accompanying drawing, simplified to illustrate the principles of the turbine only, I have provided a casing 4 which has attached to it a steam box 5 controlled preferably by a slide valve 5a and admitting steam through the box and through a hollow tube 6 which forms the This box has the escape ports for the steam arranged in two sets of which one set 8 point in one direction, slanting outwardly towards the periphery, and another set 9 of similar form but pointing in the opposite direction towards the periphery, as will appear more clearly from Figure 2. It will be understood of course that the steam box 7 and the hollow shaft 6 are stationary, being bolted to the casing 4 as shown in Figure 1. A partially closed cylindrical casing 10 surrounds and iits neatly the contour of the steam port box 7, and is formed with two hubs and mounted to revolve in the casing 4 between it and the steam box 7. It is provided with ball-bearings 14 and at one side its hub is attached iixedly to the shaft 15 which is used to translnit the power from the turbine.

A As will appear more clearly from Figure 2 the revoluble driving member 10, containing the vanes is formed after the fashion of the pelton wheel with vanes 13 which are mounted radially in the ring 12 carried in the bottoni of the member 10. At convenient points on the side of the casing 10 are outlet ports 11 and the exhaust is sidewise through these ports and through the ports 4a in casing 4, Figure 1. The vanes 13 stand at the same angle to both sets of escape ports 8 and 9 and it will be .seen that when the escape ports 9 are being used and the ports 8 closed, the driving member 10 will revolve in one direction, and it will revolve in the other direction when the ports 9 are closed and the ports 8 open. For the purpose of manipulating these ports valves 18, 19, are provided in the center of the box 4. A shaft 17 which has threaded upon its end these valves 18, 19, is mounted in casing 5, and the valves are made in the form of rings mounted upon spokes and havingpacking grooves in the face and fitting closely the inner face of the stationary steam box 7. It will be seen that in the position as shown in Figure 1 both of the valves have covered the respective sets of escape ports and so the engine is at rest; but a slight motion to the left in said figure will uncover the ports 9 and drive the revolving member 10 in one direction, whereas a movement towards the right will close the ports 9 and uncover the ports 8 and drive the member 10 in the opposite direction. From this construction it will be seen that the revolving portion of the turbine, 10, moves between two stationary casings of which one has the inlet ports and to the other the escape ports for the steam, and that by merely sliding the valves 18 and 19 the direction of motion of this part may be changed readily. The moving portion of the engine has no frictional contact with any other part except on its ball-bearings 14 and the vanes for impact of the escaping fluid remain the same for motion in both directions. Other advantages of this construction will readily occur to those familiar with the art.

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent, is the following: v

1. In combination, a lixed cylindrical steam box having ports through its periphery, a rotatable cylindrical casing surrounding the steam box and provided on its periphery with a series of inwardly projecting varies, and a valve controlling the ports.

2. In combination, a iixed cylindrical steam box having two sets of oppositely directed. ports through its periphery, a rotatable cylindrical casin g concentrically mounted. with respect to the steam box and provided on the inner face of the cylindrical portion with a series of radially directed vanes, and a valve for controlling the ports.

3. In combination, a lixed cylindrical steam box having two sets of oppositely directed ports through its periphery, a rotatable cylindrical casing concentrically mounted with respect to the steam box and provided on the inner face of the cylindrical portion with a series of radially directed vanes and a reciprocable piston valve fitting the inside of the steam box.

4. In combination, a iixed cylindrical.

with a series of radially directed. vanes, and a reciprocable piston valve having a recessed periphery provided with packing and Alitting the inside of the steam box.

5. In combination, a iixed cylindrical steambox having two sets of oppositely directed ports through its periphery, a rotatable cylindrical casing coneentrically mounted with respect to the steam box and provided on the inner face of the cylindrical portion with a series of radially directed vanes, and a reeiprocable piston valve for the inside of the steam box in two sections, each o'l" which is recessed on its periphery and provided with packing.

6. In combination, la lixed cylindrical casing, a iixed steam box provided with ports through its periphery and inclosed in the cylindrical casing, a cylindrical drive member rotatively mounted on the casing between the steam box and casing and provided with an exhaust opening and a plurality olE inwardly extending radial vanes, and a valve for the ports.

In testimony whereof I have hereunto signed my naine in the presence ol the two subscribed witnesses.

HALLET MORTON MURPHY.

Witnesses:

PAUL CARPENTER, ALBERT G. MILLER.. 

